61402736974 has 4 divisors (see below), whose sum is σ = 92104105464. Its totient is φ = 30701368486.

The previous prime is 61402736963. The next prime is 61402737023. The reversal of 61402736974 is 47963720416.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×61402736974² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15350684242 + ... + 15350684245.

It is an arithmetic number, because the mean of its divisors is an integer number (23026026366).

Almost surely, 2^61402736974 is an apocalyptic number.

61402736974 is a deficient number, since it is larger than the sum of its proper divisors (30701368490).

61402736974 is a wasteful number, since it uses less digits than its factorization.

61402736974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30701368489.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 61402736974 in words is "sixty-one billion, four hundred two million, seven hundred thirty-six thousand, nine hundred seventy-four".