60991972322 has 6 divisors (see below), whose sum is σ = 91488482379. Its totient is φ = 30495811530.

The previous prime is 60991972319. The next prime is 60991972387. The reversal of 60991972322 is 22327919906.

It can be written as a sum of positive squares in only one way, i.e., 30495986161 + 30495986161 = 174631^2 + 174631^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=174631.

It is a super-2 number, since 2×60991972322² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 261947 + ... + 436577.

Almost surely, 2^60991972322 is an apocalyptic number.

60991972322 is a deficient number, since it is larger than the sum of its proper divisors (30496510057).

60991972322 is an frugal number, since it uses more digits than its factorization.

60991972322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349264 (or 174633 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 50.

Multiplying 60991972322 by its sum of digits (50), we get a square (3049598616100 = 1746310²).

The spelling of 60991972322 in words is "sixty billion, nine hundred ninety-one million, nine hundred seventy-two thousand, three hundred twenty-two".