61530440104 has 32 divisors (see below), whose sum is σ = 138790468800. Its totient is φ = 24982283520.

The previous prime is 61530440099. The next prime is 61530440119. The reversal of 61530440104 is 40104403516.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28913617 + ... + 28915744.

It is an arithmetic number, because the mean of its divisors is an integer number (4337202150).

Almost surely, 2^61530440104 is an apocalyptic number.

It is an amenable number.

61530440104 is an abundant number, since it is smaller than the sum of its proper divisors (77260028696).

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

61530440104 is a wasteful number, since it uses less digits than its factorization.

61530440104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57829393 (or 57829389 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 61530440104 in words is "sixty-one billion, five hundred thirty million, four hundred forty thousand, one hundred four".