61651001605654 has 16 divisors (see below), whose sum is σ = 92763929235456. Its totient is φ = 30729708009000.

The previous prime is 61651001605651. The next prime is 61651001605679. The reversal of 61651001605654 is 45650610015616.

It is a super-2 number, since 2×61651001605654² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61651001605651) 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, 3615579 + ... + 11677945.

It is an arithmetic number, because the mean of its divisors is an integer number (5797745577216).

Almost surely, 2^{61651001605654} is an apocalyptic number.

61651001605654 is a deficient number, since it is larger than the sum of its proper divisors (31112927629802).

61651001605654 is a wasteful number, since it uses less digits than its factorization.

61651001605654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8074251.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 61651001605654 in words is "sixty-one trillion, six hundred fifty-one billion, one million, six hundred five thousand, six hundred fifty-four".