60909431557 has 4 divisors (see below), whose sum is σ = 65594772460. Its totient is φ = 56224090656.

The previous prime is 60909431551. The next prime is 60909431581. The reversal of 60909431557 is 75513490906.

60909431557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31570537761 + 29338893796 = 177681^2 + 171286^2 .

It is a cyclic number.

It is not a de Polignac number, because 60909431557 - 2³⁵ = 26549693189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 60909431557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60909431551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342670432 + ... + 2342670457.

It is an arithmetic number, because the mean of its divisors is an integer number (16398693115).

Almost surely, 2^60909431557 is an apocalyptic number.

It is an amenable number.

60909431557 is a deficient number, since it is larger than the sum of its proper divisors (4685340903).

60909431557 is a wasteful number, since it uses less digits than its factorization.

60909431557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685340902.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 60909431557 in words is "sixty billion, nine hundred nine million, four hundred thirty-one thousand, five hundred fifty-seven".