61431756442 has 32 divisors (see below), whose sum is σ = 105547014144. Its totient is φ = 26269110000.

The previous prime is 61431756437. The next prime is 61431756511. The reversal of 61431756442 is 24465713416.

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, 16641817 + ... + 16645507.

It is an arithmetic number, because the mean of its divisors is an integer number (3298344192).

Almost surely, 2^61431756442 is an apocalyptic number.

61431756442 is a deficient number, since it is larger than the sum of its proper divisors (44115257702).

61431756442 is a wasteful number, since it uses less digits than its factorization.

61431756442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034.

The product of its digits is 483840, while the sum is 43.

The spelling of 61431756442 in words is "sixty-one billion, four hundred thirty-one million, seven hundred fifty-six thousand, four hundred forty-two".