61213531746 has 16 divisors (see below), whose sum is σ = 127749979584. Its totient is φ = 19517357904.

The previous prime is 61213531739. The next prime is 61213531747. The reversal of 61213531746 is 64713531216.

It is not an unprimeable number, because it can be changed into a prime (61213531747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221788021 + ... + 221788296.

It is an arithmetic number, because the mean of its divisors is an integer number (7984373724).

Almost surely, 2^61213531746 is an apocalyptic number.

61213531746 is an abundant number, since it is smaller than the sum of its proper divisors (66536447838).

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

61213531746 is a wasteful number, since it uses less digits than its factorization.

61213531746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443576345.

The product of its digits is 90720, while the sum is 39.

The spelling of 61213531746 in words is "sixty-one billion, two hundred thirteen million, five hundred thirty-one thousand, seven hundred forty-six".