61454758620 has 48 divisors (see below), whose sum is σ = 181129818240. Its totient is φ = 15525412416.

The previous prime is 61454758597. The next prime is 61454758627. The reversal of 61454758620 is 2685745416.

It is a self number, because there is not a number n which added to its sum of digits gives 61454758620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61454758627) 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, 26952702 + ... + 26954981.

It is an arithmetic number, because the mean of its divisors is an integer number (3773537880).

Almost surely, 2^61454758620 is an apocalyptic number.

61454758620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61454758620 is an abundant number, since it is smaller than the sum of its proper divisors (119675059620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61454758620 is a wasteful number, since it uses less digits than its factorization.

61454758620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53907714 (or 53907712 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 61454758620 in words is "sixty-one billion, four hundred fifty-four million, seven hundred fifty-eight thousand, six hundred twenty".