61401604 has 12 divisors (see below), whose sum is σ = 117221328. Its totient is φ = 27909800.

The previous prime is 61401589. The next prime is 61401623. The reversal of 61401604 is 40610416.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697702 + ... + 697789.

It is an arithmetic number, because the mean of its divisors is an integer number (9768444).

Almost surely, 2^61401604 is an apocalyptic number.

It is an amenable number.

61401604 is a deficient number, since it is larger than the sum of its proper divisors (55819724).

61401604 is a wasteful number, since it uses less digits than its factorization.

61401604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395506 (or 1395504 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 61401604 is about 7835.9175595459. The cubic root of 61401604 is about 394.5117162581.

It can be divided in two parts, 6140 and 1604, that added together give a square (7744 = 88²).

The spelling of 61401604 in words is "sixty-one million, four hundred one thousand, six hundred four".