61457157 has 32 divisors (see below), whose sum is σ = 94296960. Its totient is φ = 39536640.

The previous prime is 61457147. The next prime is 61457161. The reversal of 61457157 is 75175416.

It is not a de Polignac number, because 61457157 - 2⁶ = 61457093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61457117) 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, 95557 + ... + 96197.

It is an arithmetic number, because the mean of its divisors is an integer number (2946780).

Almost surely, 2^61457157 is an apocalyptic number.

61457157 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61457157 is a deficient number, since it is larger than the sum of its proper divisors (32839803).

61457157 is a wasteful number, since it uses less digits than its factorization.

61457157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 61457157 is about 7839.4615248753. The cubic root of 61457157 is about 394.6306583361.

The spelling of 61457157 in words is "sixty-one million, four hundred fifty-seven thousand, one hundred fifty-seven".