156661101621700 has 36 divisors (see below), whose sum is σ = 366104943638980. Its totient is φ = 57844099059840.

The previous prime is 156661101621631. The next prime is 156661101621701. The reversal of 156661101621700 is 7126101166651.

It can be written as a sum of positive squares in 6 ways, for example, as 10942983088324 + 145718118533376 = 3308018^2 + 12071376^2 .

It is a super-2 number, since 2×156661101621700² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156661101621701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60254268555 + ... + 60254271154.

Almost surely, 2^{156661101621700} is an apocalyptic number.

156661101621700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156661101621700 is an abundant number, since it is smaller than the sum of its proper divisors (209443842017280).

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

156661101621700 is a wasteful number, since it uses less digits than its factorization.

156661101621700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120508539736 (or 120508539729 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 156661101621700 in words is "one hundred fifty-six trillion, six hundred sixty-one billion, one hundred one million, six hundred twenty-one thousand, seven hundred".