2171189156402 has 32 divisors (see below), whose sum is σ = 3801363374592. Its totient is φ = 910679814144.

The previous prime is 2171189156363. The next prime is 2171189156447. The reversal of 2171189156402 is 2046519811712.

It is a Harshad number since it is a multiple of its sum of digits (47).

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, 35944658 + ... + 36005010.

It is an arithmetic number, because the mean of its divisors is an integer number (118792605456).

Almost surely, 2^{2171189156402} is an apocalyptic number.

2171189156402 is a deficient number, since it is larger than the sum of its proper divisors (1630174218190).

2171189156402 is a wasteful number, since it uses less digits than its factorization.

2171189156402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115082.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 2171189156402 in words is "two trillion, one hundred seventy-one billion, one hundred eighty-nine million, one hundred fifty-six thousand, four hundred two".