11642555051 has 6 divisors (see below), whose sum is σ = 11679499020. Its totient is φ = 11605727576.

The previous prime is 11642555011. The next prime is 11642555069. The reversal of 11642555051 is 15055524611.

It is a de Polignac number, because none of the positive numbers 2^k-11642555051 is a prime.

It is a super-2 number, since 2×11642555051² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11642555011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42560 + ... + 158418.

It is an arithmetic number, because the mean of its divisors is an integer number (1946583170).

Almost surely, 2^11642555051 is an apocalyptic number.

11642555051 is a deficient number, since it is larger than the sum of its proper divisors (36943969).

11642555051 is an frugal number, since it uses more digits than its factorization.

11642555051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116493 (or 116176 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 11642555051 in words is "eleven billion, six hundred forty-two million, five hundred fifty-five thousand, fifty-one".