197642765154 has 32 divisors (see below), whose sum is σ = 399553801920. Its totient is φ = 65173358592.

The previous prime is 197642765141. The next prime is 197642765171. The reversal of 197642765154 is 451567246791.

It is a junction number, because it is equal to n+sod(n) for n = 197642765094 and 197642765103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269467 + ... + 684030.

It is an arithmetic number, because the mean of its divisors is an integer number (12486056310).

Almost surely, 2^197642765154 is an apocalyptic number.

197642765154 is an abundant number, since it is smaller than the sum of its proper divisors (201911036766).

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

197642765154 is a wasteful number, since it uses less digits than its factorization.

197642765154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953874.

The product of its digits is 12700800, while the sum is 57.

The spelling of 197642765154 in words is "one hundred ninety-seven billion, six hundred forty-two million, seven hundred sixty-five thousand, one hundred fifty-four".