197407620651 has 16 divisors (see below), whose sum is σ = 264449064960. Its totient is φ = 130987066560.

The previous prime is 197407620607. The next prime is 197407620661. The reversal of 197407620651 is 156026704791.

It is not a de Polignac number, because 197407620651 - 2²⁶ = 197340511787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197407620651.

It is not an unprimeable number, because it can be changed into a prime (197407620601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371031 + ... + 729711.

It is an arithmetic number, because the mean of its divisors is an integer number (16528066560).

Almost surely, 2^197407620651 is an apocalyptic number.

197407620651 is a deficient number, since it is larger than the sum of its proper divisors (67041444309).

197407620651 is a wasteful number, since it uses less digits than its factorization.

197407620651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359546.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 197407620651 in words is "one hundred ninety-seven billion, four hundred seven million, six hundred twenty thousand, six hundred fifty-one".