55616061507 has 4 divisors (see below), whose sum is σ = 74154748680. Its totient is φ = 37077374336.

The previous prime is 55616061499. The next prime is 55616061509. The reversal of 55616061507 is 70516061655.

55616061507 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 is a cyclic number.

It is not a de Polignac number, because 55616061507 - 2³ = 55616061499 is a prime.

It is a super-2 number, since 2×55616061507² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55616061509) 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, 9269343582 + ... + 9269343587.

It is an arithmetic number, because the mean of its divisors is an integer number (18538687170).

Almost surely, 2^55616061507 is an apocalyptic number.

55616061507 is a deficient number, since it is larger than the sum of its proper divisors (18538687173).

55616061507 is a wasteful number, since it uses less digits than its factorization.

55616061507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18538687172.

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 55616061507 in words is "fifty-five billion, six hundred sixteen million, sixty-one thousand, five hundred seven".