61564713801 has 32 divisors (see below), whose sum is σ = 91356035328. Its totient is φ = 36679526400.

The previous prime is 61564713781. The next prime is 61564713883. The reversal of 61564713801 is 10831746516.

It is not a de Polignac number, because 61564713801 - 2⁷ = 61564713673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61564713101) 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, 30850 + ... + 352251.

It is an arithmetic number, because the mean of its divisors is an integer number (2854876104).

Almost surely, 2^61564713801 is an apocalyptic number.

It is an amenable number.

61564713801 is a deficient number, since it is larger than the sum of its proper divisors (29791321527).

61564713801 is a wasteful number, since it uses less digits than its factorization.

61564713801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383281.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 61564713801 in words is "sixty-one billion, five hundred sixty-four million, seven hundred thirteen thousand, eight hundred one".