61457061531 has 16 divisors (see below), whose sum is σ = 84319027488. Its totient is φ = 39787488000.

The previous prime is 61457061499. The next prime is 61457061541. The reversal of 61457061531 is 13516075416.

61457061531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61457061531 - 2⁵ = 61457061499 is a prime.

It is a super-2 number, since 2×61457061531² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61457061531.

It is not an unprimeable number, because it can be changed into a prime (61457061541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473520 + ... + 589181.

It is an arithmetic number, because the mean of its divisors is an integer number (5269939218).

Almost surely, 2^61457061531 is an apocalyptic number.

61457061531 is a deficient number, since it is larger than the sum of its proper divisors (22861965957).

61457061531 is a wasteful number, since it uses less digits than its factorization.

61457061531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063262.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 61457061531 in words is "sixty-one billion, four hundred fifty-seven million, sixty-one thousand, five hundred thirty-one".