61432999923416 has 128 divisors (see below), whose sum is σ = 137657008180800. Its totient is φ = 25371736965120.

The previous prime is 61432999923413. The next prime is 61432999923437.

61432999923416 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61432999923413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326891270 + ... + 327079146.

Almost surely, 2^{61432999923416} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61432999923416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68828504090400).

61432999923416 is an abundant number, since it is smaller than the sum of its proper divisors (76224008257384).

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

61432999923416 is a wasteful number, since it uses less digits than its factorization.

61432999923416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195477 (or 195473 counting only the distinct ones).

The product of its digits is 136048896, while the sum is 68.

The spelling of 61432999923416 in words is "sixty-one trillion, four hundred thirty-two billion, nine hundred ninety-nine million, nine hundred twenty-three thousand, four hundred sixteen".