61690903280 has 40 divisors (see below), whose sum is σ = 143453389824. Its totient is φ = 24672569600.

The previous prime is 61690903279. The next prime is 61690903303. The reversal of 61690903280 is 8230909616.

61690903280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 497090 + ... + 608670.

Almost surely, 2^61690903280 is an apocalyptic number.

It is an amenable number.

61690903280 is an abundant number, since it is smaller than the sum of its proper divisors (81762486544).

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

61690903280 is a wasteful number, since it uses less digits than its factorization.

61690903280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118505 (or 118499 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 61690903280 in words is "sixty-one billion, six hundred ninety million, nine hundred three thousand, two hundred eighty".