61501157 has 4 divisors (see below), whose sum is σ = 64738080. Its totient is φ = 58264236.

The previous prime is 61501093. The next prime is 61501159. The reversal of 61501157 is 75110516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61501157 - 2⁶ = 61501093 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 (61501159) 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, 1618433 + ... + 1618470.

It is an arithmetic number, because the mean of its divisors is an integer number (16184520).

Almost surely, 2^61501157 is an apocalyptic number.

It is an amenable number.

61501157 is a deficient number, since it is larger than the sum of its proper divisors (3236923).

61501157 is a wasteful number, since it uses less digits than its factorization.

61501157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236922.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 61501157 is about 7842.2673379578. The cubic root of 61501157 is about 394.7248139377.

The spelling of 61501157 in words is "sixty-one million, five hundred one thousand, one hundred fifty-seven".