61614520231 has 32 divisors (see below), whose sum is σ = 72085579776. Its totient is φ = 52477603200.

The previous prime is 61614520189. The next prime is 61614520321. The reversal of 61614520231 is 13202541616.

It is a happy number.

It is not a de Polignac number, because 61614520231 - 2⁷ = 61614520103 is a prime.

It is a super-2 number, since 2×61614520231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61614520193 and 61614520202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61614520031) 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, 5039716 + ... + 5051926.

It is an arithmetic number, because the mean of its divisors is an integer number (2252674368).

Almost surely, 2^61614520231 is an apocalyptic number.

61614520231 is a deficient number, since it is larger than the sum of its proper divisors (10471059545).

61614520231 is a wasteful number, since it uses less digits than its factorization.

61614520231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12484 (or 12462 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 61614520231 in words is "sixty-one billion, six hundred fourteen million, five hundred twenty thousand, two hundred thirty-one".