61621804 has 12 divisors (see below), whose sum is σ = 114181704. Its totient is φ = 28998464.

The previous prime is 61621801. The next prime is 61621829. The reversal of 61621804 is 40812616.

It is not an unprimeable number, because it can be changed into a prime (61621801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453034 + ... + 453169.

It is an arithmetic number, because the mean of its divisors is an integer number (9515142).

Almost surely, 2^61621804 is an apocalyptic number.

It is an amenable number.

61621804 is a deficient number, since it is larger than the sum of its proper divisors (52559900).

61621804 is a wasteful number, since it uses less digits than its factorization.

61621804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906224 (or 906222 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 61621804 is about 7849.9556686646. The cubic root of 61621804 is about 394.9827562840.

The spelling of 61621804 in words is "sixty-one million, six hundred twenty-one thousand, eight hundred four".