61634899400 has 48 divisors (see below), whose sum is σ = 145115116800. Its totient is φ = 24341878080.

The previous prime is 61634899397. The next prime is 61634899421. The reversal of 61634899400 is 499843616.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1934672 + ... + 1966271.

It is an arithmetic number, because the mean of its divisors is an integer number (3023231600).

Almost surely, 2^61634899400 is an apocalyptic number.

It is an amenable number.

61634899400 is an abundant number, since it is smaller than the sum of its proper divisors (83480217400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61634899400 is a wasteful number, since it uses less digits than its factorization.

61634899400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901038 (or 3901029 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 61634899400 in words is "sixty-one billion, six hundred thirty-four million, eight hundred ninety-nine thousand, four hundred".