61456203531 has 6 divisors (see below), whose sum is σ = 88770071780. Its totient is φ = 40970802348.

The previous prime is 61456203517. The next prime is 61456203539. The reversal of 61456203531 is 13530265416.

61456203531 is a `hidden beast` number, since 61 + 4 + 5 + 62 + 0 + 3 + 531 = 666.

It is not a de Polignac number, because 61456203531 - 2⁶ = 61456203467 is a prime.

It is a super-2 number, since 2×61456203531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61456203539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3414233521 + ... + 3414233538.

Almost surely, 2^61456203531 is an apocalyptic number.

61456203531 is a deficient number, since it is larger than the sum of its proper divisors (27313868249).

61456203531 is a wasteful number, since it uses less digits than its factorization.

61456203531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6828467065 (or 6828467062 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 61456203531 its reverse (13530265416), we get a palindrome (74986468947).

The spelling of 61456203531 in words is "sixty-one billion, four hundred fifty-six million, two hundred three thousand, five hundred thirty-one".