61157162021 has 8 divisors (see below), whose sum is σ = 62111798400. Its totient is φ = 60203756448.

The previous prime is 61157161997. The next prime is 61157162063. The reversal of 61157162021 is 12026175116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61157162021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61157162321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207296 + ... + 406553.

It is an arithmetic number, because the mean of its divisors is an integer number (7763974800).

Almost surely, 2^61157162021 is an apocalyptic number.

It is an amenable number.

61157162021 is a deficient number, since it is larger than the sum of its proper divisors (954636379).

61157162021 is a wasteful number, since it uses less digits than its factorization.

61157162021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615403.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 61157162021 in words is "sixty-one billion, one hundred fifty-seven million, one hundred sixty-two thousand, twenty-one".