61311771652 has 12 divisors (see below), whose sum is σ = 108588319056. Its totient is φ = 30286537640.

The previous prime is 61311771649. The next prime is 61311771709. The reversal of 61311771652 is 25617711316.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92336674 + ... + 92337337.

It is an arithmetic number, because the mean of its divisors is an integer number (9049026588).

Almost surely, 2^61311771652 is an apocalyptic number.

It is an amenable number.

61311771652 is a deficient number, since it is larger than the sum of its proper divisors (47276547404).

61311771652 is a wasteful number, since it uses less digits than its factorization.

61311771652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184674098 (or 184674096 counting only the distinct ones).

The product of its digits is 52920, while the sum is 40.

The spelling of 61311771652 in words is "sixty-one billion, three hundred eleven million, seven hundred seventy-one thousand, six hundred fifty-two".