61051904 has 22 divisors (see below), whose sum is σ = 122046234. Its totient is φ = 30525440.

The previous prime is 61051901. The next prime is 61051909. The reversal of 61051904 is 40915016.

It can be written as a sum of positive squares in only one way, i.e., 58491904 + 2560000 = 7648^2 + 1600^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61051901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28787 + ... + 30834.

Almost surely, 2^61051904 is an apocalyptic number.

61051904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61051904 is a deficient number, since it is larger than the sum of its proper divisors (60994330).

61051904 is an equidigital number, since it uses as much as digits as its factorization.

61051904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59641 (or 59623 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61051904 is about 7813.5717824821. The cubic root of 61051904 is about 393.7613369038.

The spelling of 61051904 in words is "sixty-one million, fifty-one thousand, nine hundred four".