61401298761 has 24 divisors (see below), whose sum is σ = 98393461920. Its totient is φ = 36582177600.

The previous prime is 61401298753. The next prime is 61401298789. The reversal of 61401298761 is 16789210416.

61401298761 is a `hidden beast` number, since 614 + 0 + 1 + 29 + 8 + 7 + 6 + 1 = 666.

It is not a de Polignac number, because 61401298761 - 2³ = 61401298753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61401298961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5250220 + ... + 5261901.

It is an arithmetic number, because the mean of its divisors is an integer number (4099727580).

Almost surely, 2^61401298761 is an apocalyptic number.

It is an amenable number.

61401298761 is a deficient number, since it is larger than the sum of its proper divisors (36992163159).

61401298761 is a wasteful number, since it uses less digits than its factorization.

61401298761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512197 (or 10512194 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 61401298761 in words is "sixty-one billion, four hundred one million, two hundred ninety-eight thousand, seven hundred sixty-one".