61537835940 has 96 divisors (see below), whose sum is σ = 197001525504. Its totient is φ = 14060044800.

The previous prime is 61537835929. The next prime is 61537835941. The reversal of 61537835940 is 4953873516.

It is not an unprimeable number, because it can be changed into a prime (61537835941) 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, 1045290 + ... + 1102590.

It is an arithmetic number, because the mean of its divisors is an integer number (2052099224).

Almost surely, 2^61537835940 is an apocalyptic number.

61537835940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61537835940 is an abundant number, since it is smaller than the sum of its proper divisors (135463689564).

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

61537835940 is a wasteful number, since it uses less digits than its factorization.

61537835940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59877 (or 59875 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 61537835940 in words is "sixty-one billion, five hundred thirty-seven million, eight hundred thirty-five thousand, nine hundred forty".