61877994 has 32 divisors (see below), whose sum is σ = 132632640. Its totient is φ = 19176192.

The previous prime is 61877987. The next prime is 61878001. The reversal of 61877994 is 49977816.

It is an interprime number because it is at equal distance from previous prime (61877987) and next prime (61878001).

It is a super-2 number, since 2×61877994² = 7657772282928072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4812 + ... + 12120.

It is an arithmetic number, because the mean of its divisors is an integer number (4144770).

Almost surely, 2^61877994 is an apocalyptic number.

61877994 is an abundant number, since it is smaller than the sum of its proper divisors (70754646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61877994 is a wasteful number, since it uses less digits than its factorization.

61877994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7414.

The product of its digits is 762048, while the sum is 51.

The square root of 61877994 is about 7866.2566701068. The cubic root of 61877994 is about 395.5293740766.

The spelling of 61877994 in words is "sixty-one million, eight hundred seventy-seven thousand, nine hundred ninety-four".