61345527940 has 24 divisors (see below), whose sum is σ = 128830651992. Its totient is φ = 24537250560.

The previous prime is 61345527913. The next prime is 61345527967. The reversal of 61345527940 is 4972554316.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61345527913) and next prime (61345527967).

It can be written as a sum of positive squares in 4 ways, for example, as 7654150144 + 53691377796 = 87488^2 + 231714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695530 + ... + 778750.

It is an arithmetic number, because the mean of its divisors is an integer number (5367943833).

Almost surely, 2^61345527940 is an apocalyptic number.

It is an amenable number.

61345527940 is an abundant number, since it is smaller than the sum of its proper divisors (67485124052).

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

61345527940 is a wasteful number, since it uses less digits than its factorization.

61345527940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120087 (or 120085 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 61345527940 in words is "sixty-one billion, three hundred forty-five million, five hundred twenty-seven thousand, nine hundred forty".