61649676542 has 32 divisors (see below), whose sum is σ = 98834736000. Its totient is φ = 28754893728.

The previous prime is 61649676511. The next prime is 61649676553. The reversal of 61649676542 is 24567694616.

It is a congruent number.

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, 11579093 + ... + 11584415.

It is an arithmetic number, because the mean of its divisors is an integer number (3088585500).

Almost surely, 2^61649676542 is an apocalyptic number.

61649676542 is a deficient number, since it is larger than the sum of its proper divisors (37185059458).

61649676542 is a wasteful number, since it uses less digits than its factorization.

61649676542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960.

The product of its digits is 13063680, while the sum is 56.

The spelling of 61649676542 in words is "sixty-one billion, six hundred forty-nine million, six hundred seventy-six thousand, five hundred forty-two".