61620157 has 8 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 57575280.

The previous prime is 61620127. The next prime is 61620179. The reversal of 61620157 is 75102616.

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

It is a cyclic number.

It is not a de Polignac number, because 61620157 - 2¹⁵ = 61587389 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 (61620127) 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, 33373 + ... + 35170.

It is an arithmetic number, because the mean of its divisors is an integer number (8225280).

Almost surely, 2^61620157 is an apocalyptic number.

It is an amenable number.

61620157 is a deficient number, since it is larger than the sum of its proper divisors (4182083).

61620157 is a wasteful number, since it uses less digits than its factorization.

61620157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68603.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 61620157 is about 7849.8507629126. The cubic root of 61620157 is about 394.9792372786.

The spelling of 61620157 in words is "sixty-one million, six hundred twenty thousand, one hundred fifty-seven".